Logic of biology.
D001695:Biology; D002188:Cannabis; D000013:Congenital Abnormalities; D003643:Death; D005260:Female; D007878:Legislation as Topic; D009420:Nervous System; D011158:Population Growth; D011247:Pregnancy; D012070:Religion and Science; D012106:Research; D012961:Sociology; D014427:Twins